unsafeEqualityProof shows in generated core
Several tests from optics that use inspection-testing fail with GHC 9.0.1 because of this, e.g.
tests/Optics/Tests/Utils.hs:56:
tests/Optics/Tests/Labels/TH.hs:61:20: label5lhs ==- label5rhs failed:
LHS:
label5lhs = label5lhs_szze `cast` <Co:31>
label5lhs_szze
= \ @a @b s name_ age_ fishName_ pets_ ->
case unsafeEqualityProof of { UnsafeRefl co2 ->
case s of { Human x1_af3x x2_af3y x3_af3z x4_af3A ->
(Human
name_
age_
(case x3_af3z of {
GoldFish x1_aeS2 -> GoldFish fishName_;
Herring x1_aeS4 -> Herring fishName_
})
pets_)
`cast` <Co:4>
}
}
RHS:
label5rhs
= \ @a @b s name_ age_ fishName_ pets_ ->
case s of { Human ds_dpF7 ds_dpF8 ds_dpF9 ds_dpFa ->
Human
name_
age_
(case ds_dpF9 of {
GoldFish ds_dpEY -> GoldFish fishName_;
Herring ds_dpEZ -> Herring fishName_
})
pets_
}Core without -dsuppress-all
tests/Optics/Tests/Utils.hs:56:
tests/Optics/Tests/Labels/TH.hs:61:20: label5lhs ==- label5rhs failed:
LHS:
label5lhs
:: forall a b. Human a -> String -> Int -> String -> [b] -> Human b
[LclIdX,
Arity=5,
Str=<S,1*U(A,A,1*U,A)><L,U><L,U><L,U><L,U>,
Cpr=m1,
Unf=Unf{Src=InlineStable, TopLvl=True, Value=True, ConLike=True,
WorkFree=True, Expandable=True,
Guidance=ALWAYS_IF(arity=0,unsat_ok=True,boring_ok=True)
Tmpl= label5lhs_sf4S
`cast` (forall (a :: <*>_N) (b :: <*>_N).
<Human a>_R
%<'Many>_N ->_R <String>_R
%<'Many>_N ->_R <Int>_R
%<'Many>_N ->_R <String>_R
%<'Many>_N ->_R <[b]>_R
%<'Many>_N ->_R Nth:4
(<Human a>_R
%<'Many>_N ->_R N:Identity[0] <Human b>_R)
:: Coercible
(forall {a} {b}.
Human a
-> String -> Int -> String -> [b] -> Identity (Human b))
(forall {a} {b}.
Human a -> String -> Int -> String -> [b] -> Human b))}]
label5lhs
= label5lhs_sf4S
`cast` (forall (a :: <*>_N) (b :: <*>_N).
<Human a>_R
%<'Many>_N ->_R <String>_R
%<'Many>_N ->_R <Int>_R
%<'Many>_N ->_R <String>_R
%<'Many>_N ->_R <[b]>_R
%<'Many>_N ->_R Nth:4
(<Human a>_R %<'Many>_N ->_R N:Identity[0] <Human b>_R)
:: Coercible
(forall {a} {b}.
Human a -> String -> Int -> String -> [b] -> Identity (Human b))
(forall {a} {b}.
Human a -> String -> Int -> String -> [b] -> Human b))
label5lhs_sf4S
:: forall {a} {b}.
Human a -> String -> Int -> String -> [b] -> Identity (Human b)
[LclId,
Arity=5,
Str=<S,1*U(A,A,1*U,A)><L,U><L,U><L,U><L,U>,
Cpr=m1,
Unf=Unf{Src=InlineStable, TopLvl=True, Value=True, ConLike=True,
WorkFree=True, Expandable=True,
Guidance=ALWAYS_IF(arity=5,unsat_ok=True,boring_ok=False)
Tmpl= \ (@a)
(@b)
(s [Occ=Once1!] :: Human a)
(name_ [Occ=Once1] :: String)
(age_ [Occ=Once1] :: Int)
(fishName_ [Occ=Once2] :: String)
(pets_ [Occ=Once1] :: [b]) ->
case unsafeEqualityProof
@(*)
@(Any :~: Any)
@(Curry NoIx (Curry NoIx Any) :~: Curry (Append NoIx NoIx) Any)
of
{ UnsafeRefl co2 ->
case s of
{ Human _ [Occ=Dead] _ [Occ=Dead] x3_aaiE [Occ=Once1!]
_ [Occ=Dead] ->
(Human
@b
name_
age_
(case x3_aaiE of {
GoldFish _ [Occ=Dead] -> GoldFish fishName_;
Herring _ [Occ=Dead] -> Herring fishName_
})
pets_)
`cast` (Sym (N:Identity[0] <Human b>_R)
:: Coercible (Human b) (Identity (Human b)))
}
}}]
label5lhs_sf4S
= \ (@a)
(@b)
(s [Dmd=<S,1*U(A,A,1*U,A)>] :: Human a)
(name_ :: String)
(age_ :: Int)
(fishName_ :: String)
(pets_ :: [b]) ->
case unsafeEqualityProof
@(*)
@(Any :~: Any)
@(Curry NoIx (Curry NoIx Any) :~: Curry (Append NoIx NoIx) Any)
of
{ UnsafeRefl co2 [Dmd=<L,A>] ->
case s of
{ Human x1_aaiC [Dmd=<L,A>] x2_aaiD [Dmd=<L,A>]
x3_aaiE [Dmd=<L,1*U>] x4_aaiF [Dmd=<L,A>] ->
(Human
@b
name_
age_
(case x3_aaiE of {
GoldFish x1_aadU [Dmd=<L,A>] -> GoldFish fishName_;
Herring x1_aadW [Dmd=<L,A>] -> Herring fishName_
})
pets_)
`cast` (Sym (N:Identity[0] <Human b>_R)
:: Coercible (Human b) (Identity (Human b)))
}
}
RHS:
label5rhs
:: forall a b. Human a -> String -> Int -> String -> [b] -> Human b
[LclIdX,
Arity=5,
Str=<S,1*U(A,A,1*U,A)><L,U><L,U><L,U><L,U>,
Cpr=m1,
Unf=Unf{Src=InlineStable, TopLvl=True, Value=True, ConLike=True,
WorkFree=True, Expandable=True,
Guidance=ALWAYS_IF(arity=5,unsat_ok=True,boring_ok=True)
Tmpl= \ (@a)
(@b)
(s [Occ=Once1!] :: Human a)
(name_ [Occ=Once1] :: String)
(age_ [Occ=Once1] :: Int)
(fishName_ [Occ=Once2] :: String)
(pets_ [Occ=Once1] :: [b]) ->
case s of
{ Human _ [Occ=Dead] _ [Occ=Dead] ds_delQ [Occ=Once1!]
_ [Occ=Dead] ->
Human
@b
name_
age_
(case ds_delQ of {
GoldFish _ [Occ=Dead] -> GoldFish fishName_;
Herring _ [Occ=Dead] -> Herring fishName_
})
pets_
}}]
label5rhs
= \ (@a)
(@b)
(s [Dmd=<S,1*U(A,A,1*U,A)>] :: Human a)
(name_ :: String)
(age_ :: Int)
(fishName_ :: String)
(pets_ :: [b]) ->
case s of
{ Human ds_delO [Dmd=<L,A>] ds_delP [Dmd=<L,A>]
ds_delQ [Dmd=<L,1*U>] ds_delR [Dmd=<L,A>] ->
Human
@b
name_
age_
(case ds_delQ of {
GoldFish ds_delF [Dmd=<L,A>] -> GoldFish fishName_;
Herring ds_delG [Dmd=<L,A>] -> Herring fishName_
})
pets_
}These didn't show up in GHC <= 8.10. IIRC I've seen them in the past in GHC compiled from git, but never in a release. Is that change intentional?